Global linkages between teleconnection patterns and the terrestrial biosphere
Global linkages between teleconnection patterns and the terrestrial biosphere
复制标题
DOI：
10.1016/j.jag.2018.02.017
复制
发表时间：
2018-07
期刊：
影响因子：
--
通讯作者：
K. Dahlin;T. Ault
中科院分区：
文献类型：
--
作者：
K. Dahlin;T. Ault
全球碳循环的年际变化在很大程度上是由于陆地生态系统碳吸收的变化，但气候变化和陆地碳循环变化之间的联系在全球范围内还没有得到很好的了解。利用30年卫星半月叶面积指数(LAI)资料，我们发现4种气候变率模式−厄尔尼诺/南方涛动、北大西洋涛动、大西洋经线模式和印度洋偶极子模式−强烈影响年际植被生长格局，其中68%的陆地表面至少受到其中一种遥相关模式的影响，但这些影响的空间分布是不均匀的。考虑到生态系统对格局的影响，没有一种模式与叶面积指数存在唯一的正或负关系。我们的发现表明，未来遥相关模式的频率和/或大小的变化将导致陆地生物圈和全球碳循环的不同变化。
Interannual variability in the global carbon cycle is largely due to variations in carbon uptake by terrestrial ecosystems, yet linkages between climate variability and variability in the terrestrial carbon cycle are not well understood at the global scale. Using a 30-year satellite record of semi-monthly leaf area index (LAI), we show that four modes of climate variability − El Niño/Southern Oscillation, the North Atlantic Oscillation, the Atlantic Meridional Mode, and the Indian Ocean Dipole Mode − strongly impact interannual vegetation growth patterns, with 68% of the land surface impacted by at least one of these teleconnection patterns, yet the spatial distribution of these impacts is heterogeneous. Considering the patterns’ impacts by biome, none has an exclusively positive or negative relationship with LAI. Our findings imply that future changes in the frequency and/or magnitude of teleconnection patterns will lead to diverse changes to the terrestrial biosphere and the global carbon cycle.